Machine for raising or lowering ladders.



. PATENTED MAR.'8,'1904. E. F.- DAHILL& J. R. GODDARD. MACHINE FOR RAISING 0R LOWERING LADDERS.

APPLIOATIDN FILED OUT. 20, 1902.

N0 MODEL. 2 SHEETSSHEET 1.

No. 754,282. PATENTED MAIL-8. 1904.

E. F. DAHILL & J.' R. GODDARD. MACHINE FOR RAISING OR'LO-WERING LADDERS.

APPLICATION FILED 001*. 20, 1902.

H I If 1 mm" ""m lw ll l l l wi l M1 Te mil/(m2 may con-10ers.-

1 that Enenann F DAHILL V of Ehe Unltetl Eeflfcrel, county of Uh ll-lleeszlclmeetfis,

ticalll y ol' the follewingis a full elem kl enact description, reference l'JSl e bed to eh e eccempenying drew] which form pare of time speellzcetlen.

This invention. relates to i; movement in the means er" relslng, and lore:

frem "m e hcrizon'tel or a substantially verlllCELl posltzcn, reqnzrecl, by eempressed or an e uwalent under eempresslee and mec 2"- Wher-ehy fihe lealiler when raised be 1nte the desired posltlen. 1"" 1 s Tue eb eee or these improvements are, flash, 3 and speed? with which a ladder may wed in comparison with the system new in use; SGQl]Ll-, 'lIG obviate the necessity of removing horses from the tram: 01 the (lie; cunivin r l previue an ei'l'eetlve and posibive me: e of swinging she ladder in position; f nrnl1 the ability to lower the ledderquiel-zly or otherwise; lift/l1, t make it possible and practicable for one men 90 raise; lower, end place a lzxlder in the required peeltlvn, Whereas at present a force 01 frem four to men is necessary, but not always available thereby censlnge waste of velnel'lle time, wlr'ch is frequenyly fetal 5'50 those whose rescue is desired. We attain these Ol'JjEClZS by the meens and mechanism illusiretecl in the drewinEs, in wl1ich- .1 igure represents in plan View of ihe 1 ward end of an aerial ladder and truck, Z5 a side elevation having parts broken away and showing one eperetlng-cylinder in seclgion. Fig 3 isavert-ic'll longitudinal section threugh "line eenzer of 1. Fig. is e cross-section 01 Fig. 3 on line .1; :11, skewing rear VlE-W 0f cyllnlersanrl operalin meehwnlsm. Figs. and are detail views i. streting e modified form 0i taming meclenism.

Letented-fiarch 1904.

:1 KM" ll 45310 NE BEDFORD,

v, March 8, 1964.

jihe 'lrler melmllings are shown as the inverEed-lfeheped supports (1, having mheir apex the 3 Ashe shaft G3, which forms lcler C, is meuntecl.

which as a pivotal suppose for the turn-table B and 5-.

' Llrmly seen. the truclefrmne A The sea l 1+, seep G and exten lOX-lCld6P H, with its rope H; drum H creeks H end Form 110 part- 01? this I entice, which eenslsts simply of applying the ordinary ladder-truck the apparatus, Whieh will be presently (lescribed, for elevenlewcrlng, and turning of the ladder to the by one operator in e frec'sional portion the garesent system, l le removal of horses and parts 01 nhe trnel: interfering with the operating of end. lowering devices, as A. as delay in securin men required and *bne slew action said cleelees all of which eceup." several minutes whereas bythe use ei this invention the ladder be raised in e few seeends and lowered as rapidly or leis urel as desired in the sectional View 3 the turn-table B is shown as having secured upon it the plate B, which for convenience of illustration forms the hetiom of storage-tank J and the two 0 e1eting-eyllncler$ K, severally lecatenl beneelzh each side of the ladder C at a point 1n the rear of the nlerum anesg BlfBClllV'fi (or the operation ef mismg and. lowering said ladder through wired posltic'zn all of which may he eecomvenience) is opened and allows the compressed air to pass through. the pipes J into the cylinders K under the pistons K forcing them upward and through their piston-rods K causing the ladder to assumethe desired elevation, as shown by short dotted lines, Fig. 2, in which position the ladder is maintained by the engaging of the pawl L in the toothed air this operation may be repeated any numher of times, limited only to the amount of air-pressure and the size of the storage-tank.

The turning of the ladder after being raised may be effected by the engagement of the worm-Wheel P, centrally secured to the turntable plate B, with the worm B upon shaft Biwhich is provided with square ends for cranks or hand-wheels, as desired, but not shown. In this case, however, it may be more convenient to operate the turn-table by means shown in detail plan, Fig. 5, and vertical section, Fig. 6, which consist of aninternal gear D, secured to the fixed plate D, engaging with the pinion D having its shaft D mounted in turn-table plate B and operated by its hand-Wheel D*. seen that each operation maybe accomplished by one individual without having to move from his position upon the turn-table B.

We are aware that prior to our invention ladder raising and lowering devices have been made operated by gas or equivalent. We therefore do not claim such broadly.

Thus it will be- VVhat we claim, and desire to secure by Letters Patent, is

1-. In a fire apparatus, the combination of a truck, a turn-table on the truck, aladder pivotally mounted on the turn-table, a-tank or holder for fluid under pressure mounted on the turn-table beneath the horizontal axis about which the ladder swings, two vertical cylinders mounted on the turn-table directly beneath the side bars of the ladder when lowered, pistons fitted in said cylinders, two rods each pivotally connected at one end to one of the pistons and having'its other end pivotally connected to the adjacent side bar of the ladder, a valved conduit connecting said tank with the cylinders below the pistons therein, and means for controlling the escape of fluid from the cylinders.

2. In afire apparatus, the combination of a truck, a turn-table on the truck, a ladder pivotally mounted on the truck, a tank or holder on the turn-table, beneath the horizontal axis about which the ladder swings for holding fluid under pressure, a vertically-arranged cylinder on the turn-table beneath each of the side bars of' the ladder, pistons in said cylinders, rods pivotally connected at' their lower ends to said pistons and at their upper ends to the side bars of the ladder, a conduit connecting said cylinders below the pistons therein with the tank, a valve in said conduit, a shaft geared to said valve and extending beyond the sides of the ladder, a valve for regulating the escape of fluid from the cylinders, and .a

supplemental holding device for maintaining the ladder at any desired inclination.

In testimony whereof we have signed our names in the presence of two witnesses.

EDWARD F. DAHILL. JAMES R. GODDARD.

Witnesses: J AS. N. DORAN, EDWARD F. BANNON. 

